Mine drill



R; E. BOOKER Feb. 9 1926. v

MINE DRILL Filed Jan. 11I 1922 Cil Patented F eb. 9, 1926.

vrrifrslar oFF ICE..

RUSSELL E. BooKEn, oF WiNnriER, PENNSYLVANIA.

MINE DRILL.

Application led January 11, 1922. Serial No. 528,437.

T all who/a. t may concern.'

` `Be it known that I, RUssnLnE. Boomen, a citizen of the United States, and a resident of lllindber, county of Somerset, and State of Pennsylvania, have invented certainnew and useful Improvements in Mine Drills;

and I do hereby declare the following to be a full. cleyr, 'and exact description of the invention, such as will enable othersskilled in the art to which 1t appertains to make and use the same. Mly invention relates to a mine drill 'which is adapted to form holes in earthy or mineral material, either in mines, quarries,

tunnels, open cuts or elsewhere, but is particularly adapted for drilling holes in coal'y `for the purpose of inserting explosives to blow it down after it has been undercut or undercut and side cut by other apparatus.

Hy drill is also adapted to drill holes in soft kinds of rock, but for the purpose of simplicity ofdescription and illustration herein, Iwill confine myselflto its use in connection with coal mining. My `mine drill is arranged and adapted for use vin connection with a mining machine which under-cuts or`sliears` the coal, or adjacent material, or both undercuts'and shears, and my drill is adapted t-o be driven by the motor which operates the mining machine, but is provided with separate means of attachment` thereto. y.

"My mine drill is driven by the shaft of an electric or 'other motor of a mining machine, and a. flexible shaft connects it therewith, `which flexible shaft may be of any of the welldnown types.`Y

My drill is provided with a. casing, in which is mounted a set of reduction gears, so 'that'a `small but fastsrunningmotor will sulice, and the drill is consequently geared` down therefrom, to run at a proper andl` lesser speedrof rotation.

The gear ncasing isprovide'd with a breastplate or other abutment adapted to be held by the operator against his body or legs,

asthe case maybe, and is provided with af.

pair vof'handl'es by which it is grasped and held in position during the drilling Operation.

In order to rotate the drill I preferably use a worm drive forthe first reduction, including a worm, a wormwheel and shaft having a pinion mounted thereon which meshes with a larger gear wheel mounted on of my invention, I will now, in order to' make thematter more clear, refer to the annexed sheet of drawings, which form part of this specification, and in which like characters refer to like parts.

Figure l is a side elevation of my improved mine drill showing it in a coal mine with the undercutportion of the vein of coal excavated, andthe drill or` auger bit in the position it will assumef when the hole is linished, illustrating the application ofmy invention; Figure 2 is acentral vertical longitudinal sectional elevation through the driving gearcasing, taken onthe line II-@H ofFigure'B; Figure Bis a horizontal longitudinal sectional elevation through the clutchgear casingftaken on the line III-III ofFigui-e 2; Figure 4: is an en'd elevation of tlieclutch gear mounted on the end of the motor shaft with its operating lever and, attacl'iments; Figure 5 is a longitudinal sectional elevat-ion through thel drill driving n'iechanism taken on the line` VV of .F1g ure (l: Figure G 1sv afront elevation of the drilldriving mechanism with the lower p0rtion of the casing broken away to show the worm gear, andFigure 7` is alongitudinal section through the drill driving gearl mechanism. l

Referring now to the characters of refer ence on the drawings :+1 is the top or roof of a mine, 2' the bottom or floor thereof, 3 theveinof coal, 4 the undercut portion of the vein which is so out' that it can be readily blown down by inserting and tiring an explosive at the end .of the drilledihole 5; The body of the mining machineis 6, the motor mountedthereinis 7, 8 are the handles `of the mining machine, 9 is the switch `for starting and stopping the motor, 10 are the wheels of the miningl machine on which it is supported and mounted,"11 is the motor shaft of the motor?, l2 is the clutch pinion, which, when meshed with the gear 51, drives Ifhandle 1G, "and unay fbe reverse fmovement' of ii nthat manner. @if ithe drilling is -to 'be' done -lsepai-'a'tely t-he coal 'cutting- 'partof the 'appa- -ratus ima-y 'beiput out of gear by ,sliding the clutch pinion :l2 outof mesh with the g'ear 51 by 'proper movement of 4'the 'operating ,put into 2mesh fby the collar 18 having an annular :groove 14 therein, while 16 iis the operating' handle Ehaving a 'forlcengaged with 'thcigroove L14 and supplied with ra paul `1-71anda spring vslot Vi9 in the clutch gearcasing,

18, xwhich handle 16 iprojects through the which is provided with thenotches 20and 211to hold the'operatinghandle 1G in position for engagingior diseng'agingthe clutch pinion fl2 1in' or out of mesh With the :gear 5l. ,The outer end of the rmotor shaft l1 is iprovided -Witha socket 22 to :receivethc en d 2310i the iiexibledriving sha-ft 25, `which is secured ftherein by Vthe set bolt 24. The

Y ldrillcasing 30 :has a- Wormshaft' 27 rotatably 'i unounteditherein andprOvidedWith a socket A26 @and a set screw .29 tolsecure the other l'-end'ofthe flexibleshafbtherein yThe worm fio i supported 4 and held 'in line shaft -32.'1nay be frotated by the gear 42 'jack I the Apinion Y Isecurestheipinion 39 'andithezgear shaft27 is provided '-\vith"ar\vorm :28, which ymeshes 'with lthe 2Worm vXvheel 31 mounted `on'the shaft 32: this vsha-ft also having' al t@pinion uno'u'nted :and secured fthereon to rotate withiitr The' Worm wheel shaft is lalso provided -vsf'ith la" cylindrical tsocket 34. in which fitsthe reduced endfof'the'drill idriving shaft or spindle 44.'formingfaquili connection, whereby` the drill shaft 44,'While by- 'fthe Worm at as'lower `speed than said worm shaft. .I provide a key 36 to secure the Worm `vWheel 1onthe shaft-321and another Ykey 3T-to securev fthe pinion 33 thereon. The pinion 33 nneshes 'with the :gear 3S mounted on the sh'afft 451. avliichlcarries'the'gear 38 and 139, `while' 4U is the vkey which ivheel 38 onthersha'ft Another gear 42iisfmounted on the drill driving' shaft l 44vand secured theifeon "by the key n 'iprovidediin thefouteriV end ofithe'drill shaft '48. 'drill socket 45 is I *44 and has .a set screw 46 for securing a drillforfaugeribitftherein. 47 illustrates the Iusual' liis'h-tail type "of drill or auger, fand inountedand secured tovthe drill casing 30 iis u llu'east-plate ifi-'8,wvliich fis `adapted to be placed against the body or thigh of the said ihandle; vMounted v ing l5 on the shaft land Lconnected with thefclutch ipini'on 12 is operator to .assist in forcing the drill into 'the vcoal as it `frotat'es. In the Worm Wheel shaft 32 I provide an axial oil hole 49 communicating with the socket 34 in order to supplylubricant 'to "the connection between the shafts 32 and 44. The drill casing is made sectional and the parts secured together by tap -or :through bolts so that they can be conveniently assembled or disassembled. The breasplate 48 is secured yto the drill casing 30 -by 'means .of Athe counter-sunk machine screws Oandi'are @handles Which are grasped -by the -drill operator for `the purpose of manipulating the Y drill.

rReferring now Eto .the portions of the apparatus,particularly relating-to the'coal cuttingniechanism1-51 -is thedriving gear for thefopera't-ing shaft which isldriven by the pinion :12 `when `this fis -in -mesh ivith the gear 5l; 53 is the posty or support for -the operating shaft 62, fprovided `with 'bearings therefor -54 lindicates the .cutting head .gen-

erally and -56 is lthe board or support on which ythe coal cutting machine vis mounted andoperated. Y

1n headings where the top or bottom-rock is vbeing brushed or removed to lsecure h ci ght, -the power suppliedthrough ythegear A`reduction yof thedrill will permit drilling95 soft =rock vwith a suitable means 'for supporting `the 'drill and feeding it forward. By removing Lthe motor and substituting 'an attachment for the fievible shaftfany-of the coi'nmercial typesof rock-drillsr can be used for harderfdrilling.

lThe loperation of 21u-y Vmachine is as follows The :flexible sha-ft2 fis connected to the motor shaft -11 by the connection 23-and secured thereto by -the `set vscrew 24. The Voperator then holds'-the'drillavith its lpoint against the coal seam at the place 'Where he Wants it to-enter,.and the drill 4T revolves as he feeds fit into .the coal by holding the V:handles Iand -exerting pressure against holdslthe" drill -inl anv \up\\ardly `inclinedfposi- -'tion infsuch -a wva-yasftofdrillia hole with its inner endr substantially above the inner=end of 'the undercut 4. YAfter the hole-is so drilled the auger is withdrawn, .andfan "eX- plosive 'and fuse-are:insertedin the hole. the Atampin g being i accomplished in any suitable im aimer. and :the -`shot fired, x'thereby lblowing down that portion of the coal vvein' 3 vbe- `tweenlthe roof Land the undercut 4.

.Although I have shown anddescribed my invention in considerable detail7 1 do not wish -to be liniiteditotheexact and specific tdetails rthereof. asv "shown and described. but may usesuch moditicationsdn, substitutions for. or'equivalents'thereof -as areenibraced within thescope of lmy invention, yor as pointed out in the claims.

Having thus described my invention, what l claim and desire to secure by Letters Patent is:-

l. A mine drill, comprising' a gear easing, a worm mounted therein, means for driving the same, a worm Wheel mounted on a Shaft and driven by said Worm, reduction gears driven from said shaft, a drill shaft in Substantial alignment with said Worm Wheel shaft and provided with a bearing:` therein` and a drill or auger mounted on said drill Shaft.

A mine drill provided with a sectional easing', :1 Worm mounted therein and provided with driving` means. a worin Wheel driven by Said Worin, a sha'lt on which said worm Wheel is mounted, reduetion reare driven from en id Worm wheel shaft and provided with a bearing therein, and a. drill on said drill sha-ft.

3. A mine drill provided `with a sectional Casing, a Worm mounted therein and pro vided with driving mea-ns, e worm Wheel driven by said Worm, a shait on which said worm Wheel 1S mounted, reduction gears driven from said Worm shaft, a soeletedv drill shaft in substantiel alignment with said worm slia'lt and provided with a bearing;` therein, and e breast plate and handles Secured to said easing.

4L; In combination, a flexible Shaft provided at one end with a Coupling member adapted to be connected to a driving shaft, a (fusing adapted to be manually Supported and manipulated, a worin rotatably mounti ed in the easing* and connected to the other end ol" said iexible shathi'eduetion gear-inel in the easing' driven by Said Worm, and a drill bit arranged eXt-eriorly of the easingr and driven by Said reduction gearing.

In witness whereof l hereunto affix my signature.

RUSSELL Boonen. 

